KR19980082789A - Vortex chamber structure of diesel engine - Google Patents

Abstract

The present invention relates to a vortex chamber structure of a diesel engine in which a strong vortex is generated by introducing air into the vortex chamber during the compression stroke of the diesel engine, and the vortex forming ability of the diesel engine within the range in which the performance and the smoke are not deteriorated. by inhibiting improves combustibility at the time of cold start, and also, and for the purpose of suppressing the generation of NO _X gas, to this end, the present invention is formed as a bad spherical shape in the cylinder head adjacent to the one corner of the piston top and cylinder A vortex chamber structure of a diesel engine that provides a passage formed in an inclined direction in one direction between the inside and communicates with the cylinder to transform the flow of air introduced from the cylinder into a vortex during the compression stroke. The horizontal lower surface of the cylinder is inclined with respect to the lower surface of the cylinder head, When the air is swirling in the swirl chamber formed therein to provide a swirl chamber structure of a diesel engine, it characterized in that the values to find the inclined portion.

Description

Vortex chamber structure of diesel engine

The present invention relates to a vortex chamber structure of a diesel engine in which a strong vortex is generated by introducing air into the vortex chamber during the compression stroke of the diesel engine.

In general, in a gasoline engine, a mixer in which air is sufficiently mixed with fuel is sucked into a cylinder and combusted, but the diesel engine starts combustion after the fuel injected from the injection nozzle reaches the ignition temperature by mixing with air. The combustion chamber of diesel engines should be a structure that mixes the injected fuel and air well, and in this way makes the shape of the combustion chamber special, causing a strong vortex (i.e. vortex) at the end of compression, There is a method of mixing using.

As a condition required for such a combustion chamber;

1) The injected fuel must be completely burned in the shortest possible time,

2) The average effective pressure must be high,

3) low fuel consumption rate,

4) The combustion state at high speed should be good.

5) easy to start,

6) The diesel rust should be low.

On the other hand, the combustion chamber of the diesel engine is a direct injection type, pre-combustion type, vortex chamber type and air chamber type, the air chamber is not used in Korea.

Fig. 1 is a longitudinal sectional view showing the structure of a vortex chamber combustion chamber, and as shown, the vortex chamber combustion chamber is formed with a spherical vortex chamber 3 as a sub chamber in a cylinder head 2 adjacent to one corner of an upper portion of the piston 1. The fuel injection nozzle 4 and the glow plug 5 are mounted inside the vortex chamber 3.

In addition, a passage 6 formed to be inclined in one direction of the vortex chamber 3 is provided between the vortex chamber 3 and the inside of the cylinder so as to communicate the cylinder and the vortex chamber 3. The lower surface of the vortex chamber 3 connected with 6) is formed in a horizontal plane.

In this type of vortex chamber combustion chamber, air is introduced into the vortex chamber 3 during the compression stroke so that a strong vortex is generated and the fuel is injected and burned, and the fuel injected into the vortex chamber 3 is strongly turned. It is ignited and combusted by mixing with the moving air, and almost all of it is combusted in the vortex chamber 3, and some remaining fuel is burned in contact with the fresh air of the main combustion chamber, thereby tending to be burned in two stages. Therefore, the volume of the vortex chamber 3 occupies 70 to 80% of the total combustion volume, and the area of the ejection hole between the upper surface of the piston 1 and the vortex chamber 3 is 1 to 3.5% of the piston 1 area. To the extent, in this vortex chamber type, the object is not to focus on the throttling action, but aims to completely burn most of the fuel using the vortices generated in the vortex chamber 3.

By the way, in the conventional vortex chamber diesel engine, conventionally, only the vortex formation is considered, and the air and fuel mixing are improved in the holding temperature and running region, but the performance is improved. This is not well caught, even if the start does not burn well, there was a problem that badly generated white smoke.

In addition, in normal operation, there is a problem that a large amount of NO _x gas harmful to the human body is generated during combustion by improving the mixing ratio between fuel and air.

Accordingly, the present invention has been proposed to solve such a conventional problem, and improves the structure of the vortex chamber, thereby suppressing the vortex forming ability within the range in which the performance and the smoke of the diesel engine are not deteriorated, and thus the combustibility at the start of cooling. to enhance, and also for the purpose of suppressing the generation of NO _X gas.

1 is a longitudinal sectional view showing a structure of a conventional diesel engine vortex chamber.

2 is a longitudinal sectional view showing a vortex chamber structure of a diesel engine according to the present invention;

* Explanation of symbols for main parts of drawings *

One ; Piston 2; Cylinder head

3; Vortex chamber 4; Fuel injection nozzle

5; Glow plugs 6; Passage

In order to achieve the above object, the present invention is formed as a spherical inlet in the cylinder head adjacent to one corner of the upper piston, a passage formed inclined in one direction between the inside of the cylinder is provided in communication with the cylinder, the compression stroke A vortex chamber structure of a diesel engine that transforms a flow of air introduced from a cylinder into a vortex, wherein the horizontal lower surface of the vortex chamber formed inside the cylinder head is formed to be inclined with respect to the lower surface of the cylinder head, and is formed inside the vortex chamber. Provided is a vortex chamber structure of a diesel engine, wherein the vortex of air impinges on the inclined portion of the lower surface of the vortex chamber.

In addition, the horizontal lower surface of the vortex chamber is preferably formed to be inclined at an angle of about 10 to 20 degrees with respect to the lower surface of the cylinder head.

EXAMPLE

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention, the same reference numerals are assigned to the same parts as those cited in the prior art, in the present embodiment, to avoid duplication of description again Do not explain.

2 is a longitudinal sectional view showing the vortex chamber structure of the diesel engine according to the present invention.

First, according to the present invention, by changing the lower surface of the vortex chamber 3 to which the passage 6 for introducing air in the cylinder into the vortex chamber 3 is changed from an existing horizontal plane to an inclined surface which causes interference with air vortices. Inhibit the formation of vortices.

To this end, as shown in FIG. 2, in the present invention, the lower surface of the vortex chamber 3 formed inside the cylinder head 2 is inclined at an angle with respect to the lower surface of the cylinder head 2.

With this structure, the vortices of the air formed by introducing the vortex chamber 3 through the passage 6 by the upward movement of the piston 1 during the compression stroke of the diesel engine collide with the lower slope of the vortex chamber 3. As a result, continuous vortex formation is suppressed.

Further, according to the present invention, the inclination of the vortex is inclined at an angle of about 10 to 20 degrees with respect to the lower surface of the cylinder head 2 so that the overall performance of the engine does not decrease.

As described above, according to the vortex chamber structure of the diesel engine according to the present invention, by forming the lower surface of the vortex chamber in which the vortex of the air is formed to be inclined at a predetermined angle, the formation of the vortex is suppressed to a certain degree and the startability at the time of freezing start-up And white smoke due to unburned fuel is improved, and generation of NO _x gas is reduced during normal operation.

On the other hand, the present invention is not limited to the above-described specific preferred embodiment, and any person having ordinary skill in the art to which the invention belongs without departing from the gist of the invention claimed in the claims, various changes Would be possible.

Claims (2)

It is formed as a spherical inlet in a cylinder head adjacent to one corner of the upper part of the piston, and a passage formed obliquely in one direction is provided between the inside of the cylinder and communicates with the cylinder to vortex the flow of air introduced from the cylinder during the compression stroke. A vortex chamber structure of a diesel engine that is deformed, wherein the horizontal lower surface of the vortex chamber formed inside the cylinder head is formed to be inclined with respect to the lower surface of the cylinder head so that the vortex of air formed inside the vortex chamber is inclined to the lower surface of the vortex chamber. Vortex chamber structure of diesel engine, characterized in that to hit. The vortex chamber structure of a diesel engine according to claim 1, wherein the horizontal lower surface of the vortex chamber is inclined at an angle of about 10 to 20 degrees with respect to the lower surface of the cylinder head.